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CVE-2022-48748· NVD / CVE Program· CNA Linux

net: bridge: vlan: fix memory leak in __allowed_ingress

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.1% (FIRST EPSS); higher than 65.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 14be8d448fca6fe7b2a413831eedd55aef6c6511, 446ff1fc37c74093e81db40811a07b5a19f1d797, c5e216e880fa6f2cd9d4a6541269377657163098.

Low priority for now. Upgrade to Linux Linux 14be8d448fca6fe7b2a413831eedd55aef6c6511, 446ff1fc37c74093e81db40811a07b5a19f1d797, c5e216e880fa6f2cd9d4a6541269377657163098 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net: bridge: vlan: fix memory leak in __allowed_ingress When using per-vlan state, if vlan snooping and stats are disabled, untagged or priority-tagged ingress frame will go to check pvid state. If the port state is forwarding and the pvid state is not learning/forwarding, untagged or priority-tagged frame will be dropped but skb memory is not freed. Should free skb when __allowed_ingress returns false.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Jun 20, 2024
Updated
Jun 17, 2026
EPSS
1.1% · 65th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-48748

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.6 and later · before 5.10.96
  • linux linux kernel5.11 and later · before 5.15.19
  • linux linux kernel5.16 and later · before 5.16.5
  • linux linux kernel5.17

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.6affected
    • a580c76d534c7360ba68042b19cb255e8420e987 and later · before 446ff1fc37c74093e81db40811a07b5a19f1d797affected · git
    • a580c76d534c7360ba68042b19cb255e8420e987 and later · before c5e216e880fa6f2cd9d4a6541269377657163098affected · git
    • a580c76d534c7360ba68042b19cb255e8420e987 and later · before 14be8d448fca6fe7b2a413831eedd55aef6c6511affected · git
    • a580c76d534c7360ba68042b19cb255e8420e987 and later · before fd20d9738395cf8e27d0a17eba34169699fccdffaffected · git
    • before 5.6not affected · semver
    • 5.10.96 and later · up to and including 5.10.*not affected · semver
    • 5.15.19 and later · up to and including 5.15.*not affected · semver
    • 5.16.5 and later · up to and including 5.16.*not affected · semver
    • 5.17 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.16.7-15.16.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-48746Jun 20, 2024 · net/mlx5e: Fix handling of wrong devices during bond netevent
    22Monitor
  • ← EarlierCVE-2022-48747Jun 20, 2024 · block: Fix wrong offset in bio_truncate()
    30Monitor
  • Later →CVE-2022-48749Jun 20, 2024 · drm/msm/dpu: invalid parameter check in dpu_setup_dspp_pcc
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux14be8d448fca6fe7b2a413831eedd55aef6c6511Vendor (CNA)
Linux Linux446ff1fc37c74093e81db40811a07b5a19f1d797Vendor (CNA)
Linux Linuxc5e216e880fa6f2cd9d4a6541269377657163098Vendor (CNA)
Linux Linuxfd20d9738395cf8e27d0a17eba34169699fccdffVendor (CNA)
debian:linux5.16.7-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-394625 days apartclk: bcm: dvp: Assign ->num before accessing ->hws
    39Monitor
  • CVE-2021-44405 days apartx86/xen: Drop USERGS_SYSRET64 paravirt call
    35Monitor
  • CVE-2021-4731330 days apartcpufreq: CPPC: Fix potential memleak in cppc_cpufreq_cpu_init
    33Monitor
  • CVE-2024-386161 days apartwifi: carl9170: re-fix fortified-memset warning
    32Monitor
  • CVE-2021-47023113 days apartnet: marvell: prestera: fix port event handling on init
    32Monitor
  • CVE-2022-487160 days apartASoC: codecs: wcd938x: fix incorrect used of portid
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
function expand(node) {  return node.children.map(expand);}

Fixed

ts
const MAX_DEPTH = 32;function expand(node, depth = 0) {  if (depth > MAX_DEPTH) throw new Error("too deep");  return node.children.map((c) => expand(c, depth + 1));}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records